Frailea asteroides Mesemb It looks and grows like

It looks and grows like normal cactus several years but once it gets big enough the main plant stops growing but produces a large hairy inflorescence that continues to grow for the rest of the life of the plant

Leaves are purple and covered in pink to orange prickles and teeth

Or more properly the smaller the spines get until it looks almost spineless in some mature specimens

Hardy to at least zone 5 (probably zone 4) but make sure to acclimate your plant during the fall so it can harden off properly

and in total give a geometric pattern to the plant

Frailea asteroides Mesemb It looks and grows likeFrailea asteroides A tiny and cute species with round purple to green body with a depressed center. The spines are extremely small and form a nice ribbed pattern on the plant. Plant color varies on light conditions with more light giving stronger purple color. Flowers yellow. This is one of the smallest species with mature plants rarely reaching more than 2" or so in diameter. Easy to grow, just give normal succulent care of good light and careful